Impact test - tests on stones, Civil Engineering

Assignment Help:

Impact Test:

Resistance of stones to impact is found by conducting tests in impacting testing machine .It contain of a frame with guides in which a metal hammer weighing 13.5 to15 kg may freely fall from a height of 380 mm.

913_impact testing machine.png

                  Aggregate impact testing machine

Aggregates of size 10 mm to 12.5 mm range are filled in cylinder in three equal layers; each layer being tamped 25 times. Similar is then transferred to the cup and again tamped 25 times. The hammer is then permitted to fall freely on the specimen 15 times. The specimen is then sieved throughout 2.36 mm sieve. Then,

674_impact testing machine1.png

Where           

 W2 = weight of fines

W1 = original weight.

The recommended impact values for several works are:

  • for wearing course >/30%
  • for bituminous mechadam >/35%
  • for water bound mechadam >/40%

Related Discussions:- Impact test - tests on stones

Define role of diver in underwater inspection of bridge, Define Role of Div...

Define Role of Diver in Underwater Inspection of Bridge? Diver's role is primarily to point out a potential scour problem. The diver can use one of the following equipment to m

Roofs, Dimensions of trusses

Dimensions of trusses

Whole barings, Ask question #Minexaple of wholeiwhole baring 100 words acce...

Ask question #Minexaple of wholeiwhole baring 100 words accepted#

Determine the flow velocity, Determine the flow velocity in 2,000 ft of 8 i...

Determine the flow velocity in 2,000 ft of 8 inch diameter piping flowing full. The energy lost in piping is 54 ft. Use nominal pipe diameter and C = 140.     Solution: Use v =

Protection of lorry on the line, i. On single line by one or two men as req...

i. On single line by one or two men as required following and proceeding the lorry at a distance of 600 m. on the BG and 400 m. on the MG & NG carrying a banner flag across the tra

Define in brief about the term - concrete, Define in brief about the term -...

Define in brief about the term - Concrete Concrete is reinforced with steel bars in structural components so that the tensile stresses are taken up by the reinforcement. These

Determine the principle of darcy law, Determine the principle of Darcy's la...

Determine the principle of Darcy's law for laminar flow of water through saturated soil. Illustrate that the coefficient of permeability has the dimension of velocity. The d

Main advantages of using rubber dams, Question In assortment of dams in...

Question In assortment of dams in drainage channels, what are the main advantages of using rubber dams instead of steel-gate dams ? Answer Key Advantages of rubber d

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd